Rheostat



Patented nee/1e, 1o24. i

UNITED .STATES 'HAROLD DE vEAU PERRY, or CINCINNATI, omo, assIGNoR, BmrsNn AssIGN-J 1519591 PATIENT orricaff MENTS, T0 SKYLARK RADIO.'CQRPORATION, A CORPORATION 0F DELAWARE. I'

mmosram.

PERRY, a citizen of the United States,

new and useful' Improvements in Rheos'tats;

' of which theffollowing is a specification..V

' My "invention vrelates' to rheostats, of a for use on radio receivingsets.

My improved device'ls very rugged vand horizontal type, and isespeciallyadapted compact, occupies a small .panel space and A and is composed ofasmallnumber of simple 'par f' The complete' length of theresistance-unit ,mayrbe covered in one motion, Whereas,

other types in general use require .a plurality of movements.

' .M invention is ill'hstrate-i the accom- 20 y P l; Q

Figure 1, is a persp'ec ive of a portion of' the front panel ofy avradio /recelvmg set,

` showing my improved rhe'ostat inpposition wfor use,

Fig. '2, is a top plan viewiof the device and va. vsection thruthe-panel at theplace of attachment, FigA 3, is an under plan view ofthe rheostat 'l Y Fig.ljl,`is a rear elevation of the device,

Fig. ,5; is a sectionon the line 5 5 of Fig.3.""'

Referring now to -the'drawin s, A 1s a flat rheostat base of suitableinsu ating matcrial, with the portion back of the supporting panel B a'section of a larger circle than the front portion. Into the center ofthe two circles composing the periphery of the base A is moulded' abrass lnsert a and axially threaded to receive' the pivot bolt a5on'which the contact lever F is plvoted with the spring washer a2 to,ive therequlr'ed tension and after the bolt as'been adjusted Application:ned November 1, 1922. sriai. No. 598,383.

' tential rotarymovement of the leverv F means of the handle f curedto'themqin any .usual way', and eX- tend below the-base -A'andresistance element. C, to form stops and limit the'.rotation carries thecontact; l point f1 .thru the whole arc of the element Terminal lugs E,El have wires w, w se?" of the contact lever F. The stop E is'elecf- A.I trically .connected with the contactlever F by the connector D. Asinglescrew secures E, the outer end of D and one end of cito .v y thebase A. Another screw secures Elsand.,

the other end of c-to A.

The top of the outer .port of thei base vA i is graduated forconvenience in adjus ting! the contact lever F to a` secure amount oresistance desired.

I `claim as my invention and desire to secure Letters Patent of theUnited States 1 -1. A rheostat comprising an insulating base with aresistance element on one sectlon of-the periphery only and an oppositearc of said periphery thru which the handle por-l tion of a contactlever may be rotated'la conz tact lever pivotcd at or near its mid e`andhaving a contact point on the resistance end and an insulated handle onthe other end and means -for makingtelectrical connection to the contactlever and to the resistance.

' 2. A rheostatcomprising an insulating` base with a resistance elemento'n one sec v tion of the periphery only and a reading s'cale on the oposite arc of said periphery thru which the Ihandle portion of a contactlever may be rotated, a contact lever pivoted at or vnear its middleandhaving a contact point on the resistance end and an insulated handleon the other end,' a terminal lug at thefopen end of the resistanceelement, a connector between the Icontact lever and said terminal lugand a terminal lug at the-closed end of the resistance. s

3. A'rl1eostat comprising an insulating base with a resistance elementon one section it is held securely in position by' thelloclg/of/thczperiphery only and a reading scale nut a".

The contact leverI F extends in both directions from the pivot, withoutthe panel to a' handle f, and within 'to make contact with. the wires c1of the res1stance.element C,

on .the opposite arc of said periphery thru which the handle portion ofa contact lever may lie-rotated, a contact lever pivoted at or on theresistance end and an insulated handle near -its middle and having a'contact point on the other end, a terminal lug at the o l n l end of theresistance element a connectorlri tween the-contactvlever and said ternial lug,I a terminal .lug at the closed end 0 1. -tglie resistance, saidterminallug's dleon the other end, a connec'tor'between the oontactlever and a terminal lugr at the open end of the resistanre elementoterminal lug at the closed eiidof the resistance. said terminallngsforming clamping1r plates to secure the resistance to the bose and alsostops to limit the rotation of 'said Contact levenz i 5. A; rheostntconiprisin; Y an insulating.Y

base with an are on thereai' portion mid an` other are on the oppositefront portion. thev :irc on the A:iront bein,f Y of lesser radins thanthat'on the rear. :t resistance element on the rear arc. n'contiietlever pivoted substantially nt the middle of sziid huso. havingv ai wmf`tact point on the resistance end und :ininsulated handle on the outerend` :ind inezins -for making electrical connection to the conf.

tact lever and to. the resistance. c

6. A rlieostat comprising.Y nn insulating base with an are on the'reinportion `und the arc on the front being of lesser radius anotherare on' the opposite front poitio1i,-

than that onuthe rear, a resistance element on the rear are, a contctlever ivoted sub. stantially :it the iniddleof said ase, having :icontact Aio'int on the resistance end and an i insulated mnd-le ontheouter end, n readf`- in;r scalp contiguous tosixid front arc, anindicator on snid handle adi'ipted to be 'used in conjunction with saidscale, and means foi'A limitingelectrical connection to the conta'etlever und to the resistance.

In testimony whereof 1 have hereunto set`A my' hand. HAROLD DEvmUr'Eii'R ii

